Malalignment of the Lower Extremity
Types of malalignment of the lower extremity
Symptoms of knock knees and bow legs
These knee conditions are often visually noticeable in patients standing or walking.
A slight degree of bowing or knocking is normal. But if your child exhibits any of the following, it is probably a good idea to visit pediatric orthopedics :
- Excessive knee angle either inward or outward.
- Unequal knee angles. While slight variation from one side of the body to the other is normal, a large difference between one leg and the other should be investigated.
More signs and symptoms include:
- Pain or other complaint connected to the knee angle.
- Bowlegs after 3 years of age. This is when children have the greatest amount of knock-knee alignment and, therefore, bowlegs would be abnormal at this time
- Abnormal walking gait
- Knees are constantly touching/rubbing against each other, but ankles don’t.
- The distance between the ankles when standing straight up is more than 3 inches (8 cm)
- Knock knees at an angle more than 15 degrees
- Inwardly / outwardly curved legs
What are the causes of knock knees and bow legs?
BOW LEGS (Genu Varum)
Because of their folded position in the uterus, normal children are born bowlegged. This actually increases until the age of 18 months, and then the legs straighten as the child grows.
Bowleg can be caused by Rickets (a metabolic disorder), Blount’s Disease, trauma, a fracture healing incorrectly, and genetic bone growth abnormalities.
When it is not a part of normal development or due to trauma, is a symptom of a disease and not a disease itself.
KNOCK KNEES (Genu Valgum)
By the time a child reaches age three or four, they develop a knock-kneed configuration, in which their legs angle inwards.
The knock-kneed pattern straightens by about age six.
There are several potential causes of knock knees, including metabolic bone disorders and genetic disorders.
Medical causes of knock knees and bow legs
- Obesity: It can lead to ligaments in the knee becoming loose due to the excessive amount of pressure on the knees.
- Injury or illness affecting the leg or knee
- Knee arthritis: Osteoarthritis is the most commonly seen arthritis that will lead to changes in the curvature of your legs.
- Rickets: This is caused by a deficiency in vitamin D, phosphate, and calcium. This nutritional condition makes your bones become soft and weak.
- Blount’s Disease: This is a condition that causes abnormal growth in the lower leg bone called the tibia or shin bone.
- Scurvy: this condition is a result of vitamin deficiency. In rare cases, these conditions may continue into adolescence. In other cases, older children may develop it as a result of an underlying disease or condition.
Diagnosis of knock knees and bow legs
The main way orthopedic surgeons diagnose bow legs or knock knees is through a physical exam. In addition, X-rays and blood tests may be taken when needed to get more information about the knee joint and identify all underlying problems accurately.
If the doctor feels that your child’s bowed legs or knock-knees are a normal variation, no treatment is usually needed.
Depending on your child’s age, the orthopedic surgeon may recommend follow-up to make sure his or her leg alignment improves over time.
Knock Knees & Bow Legs Treatment
Exercises for knock knees and bowlegs
Exercises aim to strengthen the legs so that the knees become more stabilized and realign themselves. The doctor will put together an exercise program that should be performed routinely each day.
Since these conditions are usually linked to lower body posterior chain muscles (gluteus medius) the exercises will focus on strengthening these muscles.
Some exercises include hamstring exercises, lateral walks with ankle weights, side lunges, side step-ups, and knee presses.
Surgical Treatment with Col (Dr) Adari
In cases where knock knee follows someone into adulthood, surgery might be an option to repair their legs.
Surgery is only performed when the conditions of the bone disease are severe and persistent. There are two types of surgeries that are commonly used to treat knock knee.
One of the types is called “guided-growth” which involves stopping the growth on the bent part bone on the inside of their knee from showing. This can be done by placing a small metal device inside the knee, and it usually takes 12 months for correction to fully occur.
The second surgery option is called an osteotomy which involves the cutting and straightening of the bone in the leg in order to correct the angle of the knee.
When this is completed, the knee has a different amount of weight on it which can help the condition.